PEA FAMILY 611 



appressed instead of spreading. This is the common form in the San Francisco Bay region and occurs as far 

 south as Malibu, Los Angeles County. 



Sphaerophysa salsula (Pall.) DC. Prod. 2: 271. 1825. Perennial from a woody rootstock, the stems 

 erect, about 1 m. high, strigose. Leaves 5-7 cm. long; leaflets 9-19, elliptic to obovate, 5—10' mm. long, glabrate 

 above; racemes axillary, pedunculate, 6-15 cm. long; calyx 3-4 mm. long; corolla 12-15 mm. long, red-orange, 

 the standard with a 2-lobed yellow spot, the keel yellow below; pod bladdery-inflated, 1 -celled, borne on a reflexed 

 pedicel, but the stipe also reflexed bringing the pod to a horizontal position. An Astragalus-like plant apparently 

 recently introduced at Umatilla, Oregon, also Utah and Colorado. Native of northern and central Asia. 



19. OXYTROPIS DC. Astrag. 24. 1802. 



Perennial herbs, from a stout woody taproot and usually with a much-branched 

 crown. Leaves basal or nearly so, odd-pinnate. Flowers racemose or spicate, terminating 

 the scape-like peduncles. Calyx campanulate with subequal teeth. Petals clawed; stand- 

 ard erect, ovate or oblong; wings oblong; keel produced into a porrect beak. Stamens 10, 

 diadelphous. Pods sessile or stipitate, coriaceous, usually completely or incompletely 

 2-celled by the intrusion of the upper suture. [Name Greek, meaning sharp and keel.] 



A genus of about 160 species inhabiting North America, especially the western part, and Eurasia. Type 

 species, Oxytropis montana (L.) DC. 



Pods erect or ascending; stipules decidedly adnate to the petiole. 



Inflorescence 1-3-flowered; plants dwarf, pulvinate; corolla purple; pod inflated, ovoid. 1. O. oreophila. 



Inflorescence many-flowered; plants not pulvinate; pod oblong, not inflated. 

 Plants silky-villous, not viscid. 



Stipules glabrous on the back; leaflets 6-8 mm. long; corolla yellowish or nearly white, 10—12 mm. 



long. 2. O. Cusickii. 



Stipules more or less appressed-pilose on the back; longer leaflets 15-20 mm. long; corolla yellow, 

 15-17 mm. long. 3. O. luteola. 



Plants thinly villous, viscid and beset with slightly raised glands. 4. O. viscida. 



Pods pendent in fruit; stipules only slightly adnate at base to the petiole. 5. O. deflexa. 



1. Oxytropis oreophila A. Gray. Rock-loving Oxytrope. Fig. 2915. 



Oxytropis oreophila A. Gray, Proc. Amer. Acad. 20: 3. 1884. 

 Aragallus oreophilus A. Nels. Erythea 7: 59. 1899. 

 Spiesia oreophila Kuntze, Rev. Gen. PI. 1: 207. 1891. 



Perennial with a much branched cespitose woody caudex, densely silvery-silky pubescent 



throughout. Leaves crowded at the apex of the caudex branches, 1.5-3 cm. long; leaflets 5-11, 



lance-elliptic, 4-6 mm. long ; scape slender, 2-7 cm. long ; racemes short, 1-8-flowered ; calyx 



silky-villous, the tube 5 mm. long, the teeth 1.5 mm. long; corolla violet-purple, 10-12 mm. long; 



pod inflated, ovoid, 10 mm. long, densely white-villous. 



Rocky alpine ridges, Boreal Zones; Utah, Nevada, and the summits of Mount San Antonio and Mount San 

 Gorgonio, southern California. Type locality: Aquarius Plateau at nearly 10,000 feet altitude, Utah. June-July. 



Oxytropis columbiana St. John, Proc. Biol. Soc. Wash. 41 : 100. 1928. Perennial with a woody taproot 

 and branched crown, acaulescent. Leaves many, cancscent with appressed-pilose pubescence, becoming greater in 

 age; stipules generally appressed-pilose; leaflets 17-21, elliptic or oblong-lanceolate, acute, 8-20 mm. long; scapes 

 15-20 cm. long; spike becoming 3—5 cm. long; calyx narrowly campanulate, 9-10 mm. long, the teeth subulate, 

 2-3 mm. long; corolla 15-16 mm. long, white with delicate blue veins; keel with a large violet blotch just below 

 the apex; standard oblong, emarginate, bisulcate and reflexed; pod oblong or lanceolate in outline, attenuate to a 

 slender beak. Gravelly soils, Arid Transition Zone; along the Columbia River, Stevens County, Washington. 

 Type locality: gravelly branches of the Columbia River, Marcus, Washington. 



2. Oxytropis Cusickii Greenm. Cusick's Oxytrope. Fig. 2916. 



Oxytropis Cusickii Greenm. Erythea 7 : 116. 1899. 



Oxytropis masama St. John, Proc. Biol. Soc. Wash. 41: 101. 1928. 



Oxytropis cascadensis St. John, op. cit. 105. 



Perennial, depressed-cespitose. Leaves 4-8 cm. long, silvery with somewhat appressed villous 

 pubescence ; leaflets 7-19, oblong-lanceolate, 4-8 mm. long, acute or rarely obtuse, the margins 

 more or less involute ; stipules scarious, 3-nerved, glabrous or nearly so on the outer surface ; 

 scape in fruit nearly twice the length of the leaves; flowers yellowish, 10-12 mm. long; calyx 

 7-9 mm. long, villous-canescent, with shorter black hairs intermingled ; teeth 2 mm. long ; stand- 

 ard 10-12 mm. long, oblong-obovate. deeply emarginate; pod cylindric, 15-20 mm. long, ap- 

 pressed-pubescent with white and black hairs. 



Alpine summits, Boreal Zones; Olympic and Cascade Mountains, Washington, and the Wallowa Mountains, 

 Oregon. Type locality : alpine summits, Wallowa Mountains, Oregon. July-Aug. 



3. Oxytropis luteola (Greene) Piper. Yellow-flowered Oxytrope. Fig. 2917. 



Aragallus luteolus Greene, Proc. Biol. Soc. Wash. 18: 17. 1905. 

 Oxytropis luteolus Piper in Piper & Beattie, Fl. Northw. Coast 227. 1915. 

 Oxytropis okanoganea St. John, Proc. Biol. Soc. Wash. 41 : 102. 1928. 

 Oxytropis olympica St. John, Proc. Biol. Soc. Wash. 41 : 103. 1928. 



Perennial, the somewhat woody caudex branches forming few to several crowns. Leaves 

 6-10 cm. long, rather densely appressed-villous and canescent or almost silvery; leaflets .15-21, 

 lance-elliptic to linear-lanceolate, acutish or sharply acute, 8-15 mm. long; scapes 10-18 cm. long; 

 spikes 3-5 cm. long, 7-15-flowered, the flowers spreading or more or less ascending; bracts 

 lanceolate, 5 mm. long ; calyx-tube cylindric, 5-6 mm. long, villous with white and black hairs ; 



